基于分段外推法的锚泊定位悬链线浮子的影响

为研究悬链线中浮子位置和浮力对海洋平台抵抗干扰能力的影响，以分段外推法建立多成分悬链线的数学模型.考虑海流力以及弹性伸长，获得相同预紧力下悬链线长度与顶端水平张力随浮子位置的变化趋势.通过对相同扰动下不同浮子位置对平台位移响应分析，确定在给定干扰力作用下的最佳浮子位置.选用不同浮子的尺寸改变浮力，研究固定干扰力下浮子对悬链线顶端位移以及其长度的影响，获得最佳浮子位置下的浮子尺度.研究结论可为锚泊定位系统中悬链线浮子的配置提供参考.
In order to study the influence of both buoy position and buoyancy on capability of anti-disturbance for floating structure catenary, the mathematic model of multi-component catenary was established by using piecewise extrapolation method. With consideration of current forces and elastic extension, the variation trend of catenary length and top horizontal tension changes following buoy position changing with same preload was derived. By analysis of moving response of the platform under different buoy positions and same disturbance, the optimum buoy positions at a disturbing force were determined. Then the buoy with different size were selected to change the buoyancy for studying the influence of buoy on catenary top displacement and its length under fixed disturbance, in result, the optimum buoy sizes at optimum positions were derived. The results can provide a reference for the configuration of the catenary in moored positioning system.